Vashnik's Sanguine Rancor

Your attacks have a very high chance to build sanguine rancor within you. After $1303479u times, the rancor erupts to scourge your target and all nearby enemies with crimson bile, dealing Shadow damage split between them. Damage increased by 30% per additional enemy, up to 150%.

If only one enemy is struck, the concentrated bile deals an additional Shadow damage over 3 sec.